I don't think Odium is actually on Roshar, but one of the other planets in the Greater Roshar solar system. It has 3 planets, and the stuff with the Heralds actually takes place on a different planet in the system.
Yep.
Braize = Damnation, which is in the Roshar system. According to wiki, there's another planet there called Ashyn, but we don't know anything about it really, other than rumors. So the Tranquiline Halls could have been from outside of Roshar's system originally. Maybe.
The way Odium describes his situation is "shackled". Presumably this is by the Oathpact. But the Oathpact has been weakened by the heralds breaking their vows, other than Talenalat. This could be why Odium isn't completely bound to Braize, and can appear on Roshar. Perhaps even he is only now able to appear on Roshar now that Talenalat is now on Roshar and there are no Heralds on Braize. The book characters speculate on this and think that they need to kill a Herald to send them back to Braize and halt the Desolation for the time being. I'm guessing that this won't work though, because plot, and because it delays the inevitable.
Also, since at the end, Moash kills Jezrien with that fancy knife (I had flashbacks to the Black Prism series and the blinder's knife, /nerd ), I would bet that Odium's current plan is to really kill (not kill in such a way that they return to Braize) all the Heralds, ending the Oathpact for good, and removing his shackles.
The fly in that ointment is that he already agreed to a trial by champions with Dalinar, and shardholders (Odium, Sazed) aren't allowed to break their word once given.
The way Odium describes his situation is "shackled". Presumably this is by the Oathpact. But the Oathpact has been weakened by the heralds breaking their vows, other than Talenalat. This could be why Odium isn't completely bound to Braize, and can appear on Roshar. Perhaps even he is only now able to appear on Roshar now that Talenalat is now on Roshar and there are no Heralds on Braize. The book characters speculate on this and think that they need to kill a Herald to send them back to Braize and halt the Desolation for the time being. I'm guessing that this won't work though, because plot, and because it delays the inevitable.
Also, since at the end, Moash kills Jezrien with that fancy knife (I had flashbacks to the Black Prism series and the blinder's knife, /nerd ), I would bet that Odium's current plan is to really kill (not kill in such a way that they return to Braize) all the Heralds, ending the Oathpact for good, and removing his shackles.
The fly in that ointment is that he already agreed to a trial by champions with Dalinar, and shardholders (Odium, Sazed) aren't allowed to break their word once given.
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